/*
 * Created on 30-Aug-2004
 * Created by Paul Gardner
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

package org.gudy.azureus2.pluginsimpl.local.config;

/**
 * @author parg
 *
 */

import java.util.ArrayList;
import java.util.List;

import org.gudy.azureus2.core3.config.COConfigurationManager;
import org.gudy.azureus2.core3.config.ParameterListener;
import org.gudy.azureus2.plugins.config.ConfigParameter;
import org.gudy.azureus2.plugins.config.ConfigParameterListener;

public class ConfigParameterImpl implements ConfigParameter, ParameterListener {
    protected String key;

    protected List listeners = new ArrayList();

    public ConfigParameterImpl(String _key) {
        key = _key;
    }

    public void parameterChanged(String parameterName) {
        for (int i = 0; i < listeners.size(); i++) {

            ((ConfigParameterListener) listeners.get(i)).configParameterChanged(this);
        }
    }

    public void addConfigParameterListener(ConfigParameterListener l) {
        listeners.add(l);

        if (listeners.size() == 1) {

            COConfigurationManager.addParameterListener(key, this);
        }
    }

    public void removeConfigParameterListener(ConfigParameterListener l) {
        listeners.remove(l);

        if (listeners.size() == 0) {

            COConfigurationManager.removeParameterListener(key, this);
        }
    }
}
